| High water level in El Portal upstream of the S27 1.82 feet above sea level at the time the upper picture was taken (same picture as shown on main page). | |
| Low water level in El Portal upstream of the S27 was 0.7 feet above sea level at the time the lower picture was taken. Note that while the water level in the canal by El Portal goes up and down at this time to light rainfall the water levels upstream did not change significantly | |